Sigma Rules
3,132 rules found for "sigma"
Use of W32tm as Timer
When configured with suitable command line arguments, w32tm can act as a delay mechanism
Wab Execution From Non Default Location
Detects execution of wab.exe (Windows Contacts) and Wabmig.exe (Microsoft Address Book Import Tool) from non default locations as seen with bumblebee activity
Wab/Wabmig Unusual Parent Or Child Processes
Detects unusual parent or children of the wab.exe (Windows Contacts) and Wabmig.exe (Microsoft Address Book Import Tool) processes as seen being used with bumblebee activity
All Backups Deleted Via Wbadmin.EXE
Detects the deletion of all backups or system state backups via "wbadmin.exe". This technique is used by numerous ransomware families and actors. This may only be successful on server platforms that have Windows Backup enabled.
Windows Backup Deleted Via Wbadmin.EXE
Detects the deletion of backups or system state backups via "wbadmin.exe". This technique is used by numerous ransomware families and actors. This may only be successful on server platforms that have Windows Backup enabled.
Sensitive File Dump Via Wbadmin.EXE
Detects the dump of highly sensitive files such as "NTDS.DIT" and "SECURITY" hive. Attackers can leverage the "wbadmin" utility in order to dump sensitive files that might contain credential or sensitive information.
File Recovery From Backup Via Wbadmin.EXE
Detects the recovery of files from backups via "wbadmin.exe". Attackers can restore sensitive files such as NTDS.DIT or Registry Hives from backups in order to potentially extract credentials.
Sensitive File Recovery From Backup Via Wbadmin.EXE
Detects the dump of highly sensitive files such as "NTDS.DIT" and "SECURITY" hive. Attackers can leverage the "wbadmin" utility in order to dump sensitive files that might contain credential or sensitive information.
Potentially Suspicious WebDAV LNK Execution
Detects possible execution via LNK file accessed on a WebDAV server.
Chopper Webshell Process Pattern
Detects patterns found in process executions cause by China Chopper like tiny (ASPX) webshells
Webshell Hacking Activity Patterns
Detects certain parent child patterns found in cases in which a web shell is used to perform certain credential dumping or exfiltration activities on a compromised system
Webshell Detection With Command Line Keywords
Detects certain command line parameters often used during reconnaissance activity via web shells
Suspicious Process By Web Server Process
Detects potentially suspicious processes being spawned by a web server process which could be the result of a successfully placed web shell or exploitation
Webshell Tool Reconnaissance Activity
Detects processes spawned from web servers (PHP, Tomcat, IIS, etc.) that perform reconnaissance looking for the existence of popular scripting tools (perl, python, wget) on the system via the help commands
PPL Tampering Via WerFaultSecure
Detects potential abuse of WerFaultSecure.exe to dump Protected Process Light (PPL) processes like LSASS or to freeze security solutions (EDR/antivirus). This technique is used by tools such as EDR-Freeze and WSASS to bypass PPL protections and access sensitive information or disable security software. Distinct command line patterns help identify the specific tool: - WSASS usage typically shows: "WSASS.exe WerFaultSecure.exe [PID]" in ParentCommandLine - EDR-Freeze usage typically shows: "EDR-Freeze_[version].exe [PID] [timeout]" in ParentCommandLine Legitimate debugging operations using WerFaultSecure are rare in production environments and should be investigated.
Potential Credential Dumping Via WER
Detects potential credential dumping via Windows Error Reporting LSASS Shtinkering technique which uses the Windows Error Reporting to dump lsass
Potential ReflectDebugger Content Execution Via WerFault.EXE
Detects execution of "WerFault.exe" with the "-pr" commandline flag that is used to run files stored in the ReflectDebugger key which could be used to store the path to the malware in order to masquerade the execution flow
Suspicious Child Process Of Wermgr.EXE
Detects suspicious Windows Error Reporting manager (wermgr.exe) child process
Suspicious Execution Location Of Wermgr.EXE
Detects suspicious Windows Error Reporting manager (wermgr.exe) execution location.
Suspicious File Download From IP Via Wget.EXE
Detects potentially suspicious file downloads directly from IP addresses using Wget.exe
Suspicious File Download From File Sharing Domain Via Wget.EXE
Detects potentially suspicious file downloads from file sharing domains using wget.exe
Suspicious File Download From IP Via Wget.EXE - Paths
Detects potentially suspicious file downloads directly from IP addresses and stored in suspicious locations using Wget.exe
Suspicious Where Execution
Adversaries may enumerate browser bookmarks to learn more about compromised hosts. Browser bookmarks may reveal personal information about users (ex: banking sites, interests, social media, etc.) as well as details about internal network resources such as servers, tools/dashboards, or other related infrastructure.
Enumerate All Information With Whoami.EXE
Detects the execution of "whoami.exe" with the "/all" flag
Whoami.EXE Execution From Privileged Process
Detects the execution of "whoami.exe" by privileged accounts that are often abused by threat actors
Group Membership Reconnaissance Via Whoami.EXE
Detects the execution of whoami.exe with the /group command line flag to show group membership for the current user, account type, security identifiers (SID), and attributes.
Whoami.EXE Execution With Output Option
Detects the execution of "whoami.exe" with the "/FO" flag to choose CSV as output format or with redirection options to export the results to a file for later use.
Whoami.EXE Execution Anomaly
Detects the execution of whoami.exe with suspicious parent processes.
Security Privileges Enumeration Via Whoami.EXE
Detects a whoami.exe executed with the /priv command line flag instructing the tool to show all current user privileges. This is often used after a privilege escalation attempt.
Suspicious WindowsTerminal Child Processes
Detects suspicious children spawned via the Windows Terminal application which could be a sign of persistence via WindowsTerminal (see references section)
Add New Download Source To Winget
Detects usage of winget to add new additional download sources
Add Insecure Download Source To Winget
Detects usage of winget to add a new insecure (http) download source. Winget will not allow the addition of insecure sources, hence this could indicate potential suspicious activity (or typos)
Add Potential Suspicious New Download Source To Winget
Detects usage of winget to add new potentially suspicious download sources
Install New Package Via Winget Local Manifest
Detects usage of winget to install applications via manifest file. Adversaries can abuse winget to download payloads remotely and execute them. The manifest option enables you to install an application by passing in a YAML file directly to the client. Winget can be used to download and install exe, msi or msix files later.
Winrar Compressing Dump Files
Detects execution of WinRAR in order to compress a file with a ".dmp"/".dump" extension, which could be a step in a process of dump file exfiltration.
Potentially Suspicious Child Process Of WinRAR.EXE
Detects potentially suspicious child processes of WinRAR.exe.
WinRAR Execution in Non-Standard Folder
Detects a suspicious WinRAR execution in a folder which is not the default installation folder
AWL Bypass with Winrm.vbs and Malicious WsmPty.xsl/WsmTxt.xsl
Detects execution of attacker-controlled WsmPty.xsl or WsmTxt.xsl via winrm.vbs and copied cscript.exe (can be renamed)
Remote Code Execute via Winrm.vbs
Detects an attempt to execute code or create service on remote host via winrm.vbs.
Remote PowerShell Session Host Process (WinRM)
Detects remote PowerShell sections by monitoring for wsmprovhost (WinRM host process) as a parent or child process (sign of an active PowerShell remote session).
Suspicious Processes Spawned by WinRM
Detects suspicious processes including shells spawnd from WinRM host process
Potential Lateral Movement via Windows Remote Shell
Detects a child process spawned by 'winrshost.exe', which suggests remote command execution through Windows Remote Shell (WinRs) and may indicate potential lateral movement activity.
Winrs Local Command Execution
Detects the execution of Winrs.exe where it is used to execute commands locally. Commands executed this way are launched under Winrshost.exe and can represent proxy execution used for defense evasion or lateral movement.
Compress Data and Lock With Password for Exfiltration With WINZIP
An adversary may compress or encrypt data that is collected prior to exfiltration using 3rd party utilities
Wlrmdr.EXE Uncommon Argument Or Child Process
Detects the execution of "Wlrmdr.exe" with the "-u" command line flag which allows anything passed to it to be an argument of the ShellExecute API, which would allow an attacker to execute arbitrary binaries. This detection also focuses on any uncommon child processes spawned from "Wlrmdr.exe" as a supplement for those that posses "ParentImage" telemetry.
New ActiveScriptEventConsumer Created Via Wmic.EXE
Detects WMIC executions in which an event consumer gets created. This could be used to establish persistence
Potential Windows Defender Tampering Via Wmic.EXE
Detects potential tampering with Windows Defender settings such as adding exclusion using wmic
New Process Created Via Wmic.EXE
Detects new process creation using WMIC via the "process call create" flag